Java日期工具类大全
public class MyUtil {
private static final String CNUMBER_PATTERN =
"^[0-9]*$";
private static SimpleDateFormat bartDateFormat =
new SimpleDateFormat(
"yyyy-MM-dd");
public static int getYear(Date date) {
try {
String form_date = bartDateFormat.format(date);
return Integer.parseInt(form_date.substring(
0,
4));
}
catch (Exception ex) {
return Integer.parseInt(getCurrentTime().substring(
0,
4));
}
}
public static int getMonth(Date date) {
try {
String form_date = bartDateFormat.format(date);
return Integer.parseInt(form_date.substring(
5, form_date
.lastIndexOf(
"-")));
}
catch (Exception ex) {
String currenttimel = getCurrentTime();
return Integer.parseInt(currenttimel.substring(
5, currenttimel
.lastIndexOf(
"-")));
}
}
public static int getDay(Date date) {
try {
String form_date = bartDateFormat.format(date);
return Integer.parseInt(form_date.substring(form_date
.lastIndexOf(
"-") +
1, form_date.length()));
}
catch (Exception ex) {
String currenttimel = getCurrentTime();
return Integer.parseInt(currenttimel.substring(
5, currenttimel
.lastIndexOf(
"-")));
}
}
public static String[]
getMonth_days(Date date) {
String[] month_day = {
"31",
"28",
"31",
"30",
"31",
"30",
"31",
"31",
"30",
"31",
"30",
"31" };
int year = getYear(date);
if (((year %
4 ==
0) && (year %
100 !=
0)) || (year %
400 ==
0))
month_day[
1] =
"29";
return month_day;
}
public static int getCount(String str, String sign) {
if (str ==
null) {
return 0;
}
StringTokenizer s =
new StringTokenizer(str, sign);
return s.countTokens();
}
public static String[]
getArray(String str, String sign) {
int count = getCount(str, sign);
int j =
0;
String[] arr =
new String[count];
for (
int i =
0; i < count; i++) {
if (str.indexOf(sign) != -
1) {
j = str.indexOf(sign);
arr[i] = str.substring(
0, j);
str = str.substring(j +
1);
}
else {
arr[i] = str;
}
}
return arr;
}
public static String
getCurrentTime() {
java.sql.Timestamp temp =
new java.sql.Timestamp(System
.currentTimeMillis());
return (temp.toString()).substring(
0,
19);
}
public static Date
toDateType(String s) {
DateFormat df = DateFormat.getDateInstance();
df.setLenient(
false);
s = s.replace(
'/',
'-');
s = s.replace(
'.',
'.');
try {
return df.parse(s);
}
catch (Exception e) {
return null;
}
}
public static String
unicodeToGB(String strIn) {
byte[] b;
String strOut =
null;
if (strIn ==
null || (strIn.trim()).equals(
"")) {
return strIn;
}
try {
b = strIn.getBytes(
"GBK");
strOut =
new String(b,
"ISO8859_1");
}
catch (UnsupportedEncodingException e) {
}
return strOut;
}
public static String
GBToUnicode(String strIn) {
String strOut =
null;
if (strIn ==
null || (strIn.trim().equals(
""))) {
return strIn;
}
try {
byte[] b = strIn.getBytes(
"ISO8859_1");
strOut =
new String(b,
"GBK");
}
catch (Exception e) {
}
return strOut;
}
public static String
UTFToUnicode(String strIn) {
String strOut =
null;
if (strIn ==
null || (strIn.trim().equals(
""))) {
return strIn;
}
try {
byte[] b = strIn.getBytes(
"ISO8859_1");
strOut =
new String(b,
"UTF-8");
}
catch (Exception e) {
}
return strOut;
}
public static String
UTFToGBK(String strIn) {
String strOut =
null;
if (strIn ==
null || (strIn.trim().equals(
""))) {
return strIn;
}
try {
byte[] b = strIn.getBytes(
"GBK");
strOut =
new String(b,
"UTF-8");
}
catch (Exception e) {
}
return strOut;
}
public static String
buildURL(Map parameters) {
StringBuffer url =
new StringBuffer();
if (parameters !=
null && parameters.size() >
0) {
url.append(
"?");
for (Iterator iter = parameters.keySet().iterator(); iter.hasNext();) {
String key = (String) iter.next();
String[] values = (String[]) parameters.get(key);
for (
int i =
0; i < values.length; i++) {
url.append(key).append(
"=").append(values[i]).append(
"&");
}
}
}
return url.toString();
}
/**
* 获得当前时间(根据格式字符串)
*
* @param format
* String 格式字符串
* @return String
*/
public static String
getDateByFormat(String format) {
Calendar date = Calendar.getInstance();
java.text.SimpleDateFormat sim =
new java.text.SimpleDateFormat(format);
String str = sim.format(date.getTime());
return str;
}
/**
* 获得当前时间
*
* @return String
*/
public static String
getDate() {
Calendar date = Calendar.getInstance();
java.text.SimpleDateFormat sim =
new java.text.SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");
String str = sim.format(date.getTime());
return str;
}
/**
* 获得当前时间
*
* @return Date
*/
public static Date
getNowDate() {
return getDate(getDate());
}
/**
* 字符串转换为时间
*
* @param date
* String
* @return Date
*/
public static Date
getDate(String date) {
try {
SimpleDateFormat localTime =
new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");
Date date1 = localTime.parse(date);
return date1;
}
catch (ParseException ex) {
ex.printStackTrace();
}
return null;
}
/**
* 字符串转换为时间2
*
* @param date
* String
* @return Date
*/
public static Date
getDate2(String date) {
try {
SimpleDateFormat localTime =
new SimpleDateFormat(
"yyyy-MM-dd");
Date date1 = localTime.parse(date);
return date1;
}
catch (ParseException ex) {
ex.printStackTrace();
}
return null;
}
/**
* 字符串转换为时间3
*
* @param date
* String
* @return Date
*/
public static Date
getDate3(String date) {
try {
SimpleDateFormat localTime =
new SimpleDateFormat(
"yyyy-MM");
Date date1 = localTime.parse(date);
return date1;
}
catch (ParseException ex) {
ex.printStackTrace();
}
return null;
}
/**
* 字符串转换为时间3
*
* @param date
* String
* @return Date
*/
public static Date
getDateByHHMM(String date) {
try {
SimpleDateFormat localTime =
new SimpleDateFormat(
"HH:mm");
Date date1 = localTime.parse(date);
return date1;
}
catch (ParseException ex) {
ex.printStackTrace();
}
return null;
}
/**
* 字符串转换为时间3
*
* @param date
* String
* @return Date
*/
public static Date
getDate4(String date) {
try {
SimpleDateFormat localTime =
new SimpleDateFormat(
"yyyy");
Date date1 = localTime.parse(date);
return date1;
}
catch (ParseException ex) {
ex.printStackTrace();
}
return null;
}
/**
* 取得秒数
*/
public static Long
getDateDiff_Second(Date d1, Date d2) {
return (d2.getTime() - d1.getTime()) /
1000;
}
/**
* 取得分钟
*
* @param d1
* Date
* @param d2
* Date
* @return Long
*/
public static Long
getDateDiff_Minute(Date d1, Date d2) {
return (d2.getTime() - d1.getTime()) / (
1000 *
60);
}
/**
* 取得小时
*
* @param d1
* Date
* @param d2
* Date
* @return Long
*/
public static Long
getDateDiff_Hour(Date d1, Date d2) {
return (d2.getTime() - d1.getTime()) / (
1000 *
3600);
}
public static Long
getDateDiff_Hour(String d1, String d2) {
return (getDate(d2).getTime() - getDate(d1).getTime()) / (
1000 *
3600);
}
/**
* 取得天数
*
* @param d1
* Date
* @param d2
* Date
* @return Long
*/
public static Long
getDateDiff_Day(Date d1, Date d2) {
return (d2.getTime() - d1.getTime()) / (
1000 *
3600 *
24);
}
public static Long
getDateDiff_Day(String d1, String d2) {
return (getDate(d2).getTime() - getDate(d1).getTime())
/ (
1000 *
3600 *
24);
}
/**
* 取得星期间隔
*
* @param d1
* Date
* @param d2
* Date
* @return Long
*/
public static Long
getDateDiff_Week(Date d1, Date d2) {
return (d2.getTime() - d1.getTime()) / (
1000 *
3600 *
24 *
7);
}
/**
* 取得当前时间的 间隔多少小时之后的时间
*
* @param hour
* int
* @return String
*/
public static String
getDateAdd(
int hour) {
Calendar calendar = Calendar.getInstance();
java.text.SimpleDateFormat sd =
new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");
calendar.set(Calendar.HOUR, hour + calendar.get(Calendar.HOUR));
String enddate = sd.format(calendar.getTime());
return enddate;
}
/**
* 取得当前时间的 间隔多少小时之后的时间
*
* @param hour
* int
* @return String
*/
public static String
getDateAdd(String starttime,
int hour) {
Calendar calendar = Calendar.getInstance();
java.text.SimpleDateFormat sd =
new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");
calendar.setTime(getDate(starttime));
calendar.set(Calendar.HOUR, hour + calendar.get(Calendar.HOUR));
String date = sd.format(calendar.getTime());
return date;
}
public static Date
getDateAdd(Date starttime,
int hour) {
Calendar calendar = Calendar.getInstance();
java.text.SimpleDateFormat sd =
new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");
calendar.setTime(starttime);
calendar.set(Calendar.HOUR, hour + calendar.get(Calendar.HOUR));
return calendar.getTime();
}
/**
* 取得当前时间的 间隔多少小时之后的时间
*
* @param hour
* int
* @return String
*/
public static String
getDateAdd2(String starttime,
int hour) {
Calendar calendar = Calendar.getInstance();
java.text.SimpleDateFormat sd =
new SimpleDateFormat(
"yyyy-MM-dd");
calendar.setTime(getDate2(starttime));
calendar.set(Calendar.HOUR, hour + calendar.get(Calendar.HOUR));
String date = sd.format(calendar.getTime());
return date;
}
/**
* 取得当前时间的 间隔多少秒之后的时间
*
* @param hour
* int
* @return String
*/
public static String
getDateAddSecond(String starttime,
long second) {
Calendar calendar = Calendar.getInstance();
java.text.SimpleDateFormat sd =
new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");
calendar.setTime(getDate2(starttime));
calendar.set(Calendar.SECOND, (
int) (second + calendar
.get(Calendar.SECOND)));
String date = sd.format(calendar.getTime());
return date;
}
/**
* 获得时间格式的文件名称
*
* @return String
*/
public static String
getFileName() {
Calendar date = Calendar.getInstance();
java.text.SimpleDateFormat sim =
new java.text.SimpleDateFormat(
"yyyyMMdd_hhmmss");
String str = sim.format(date.getTime());
return str;
}
@SuppressWarnings(
"finally")
public static String
get_MM_DD(String s) {
java.text.SimpleDateFormat sim =
new java.text.SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");
Date date;
String str =
"";
try {
date = sim.parse(s);
sim =
new java.text.SimpleDateFormat(
"[MM-dd]");
str = sim.format(date.getTime());
}
catch (ParseException e) {
e.printStackTrace();
}
finally {
}
return str;
}
@SuppressWarnings(
"finally")
public static String
get_YYYY_MM_DD(String s) {
java.text.SimpleDateFormat sim =
new java.text.SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");
Date date;
String str =
"";
try {
date = sim.parse(s);
sim =
new java.text.SimpleDateFormat(
"yyyy-MM-dd");
str = sim.format(date.getTime());
}
catch (ParseException e) {
e.printStackTrace();
}
finally {
}
return str;
}
@SuppressWarnings(
"finally")
public static String
get_YYYY_MM(String s) {
java.text.SimpleDateFormat sim =
new java.text.SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");
Date date;
String str =
"";
try {
date = sim.parse(s);
sim =
new java.text.SimpleDateFormat(
"yyyy-MM");
str = sim.format(date.getTime());
}
catch (ParseException e) {
e.printStackTrace();
}
finally {
}
return str;
}
public static String
get_YYYY(String s) {
java.text.SimpleDateFormat sim =
new java.text.SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");
Date date;
String str =
"";
try {
date = sim.parse(s);
sim =
new java.text.SimpleDateFormat(
"yyyy");
str = sim.format(date.getTime());
}
catch (ParseException e) {
e.printStackTrace();
}
finally {
}
return str;
}
/**
* 检查IP是否合法
*
* @param value
* @return
*/
public static boolean ipValid(String s) {
String regex0 =
"(2[0-4]\\d)" +
"|(25[0-5])";
String regex1 =
"1\\d{2}";
String regex2 =
"[1-9]\\d";
String regex3 =
"\\d";
String regex =
"(" + regex0 +
")|(" + regex1 +
")|(" + regex2 +
")|("
+ regex3 +
")";
regex =
"(" + regex +
").(" + regex +
").(" + regex +
").(" + regex
+
")";
Pattern p = Pattern.compile(regex);
Matcher m = p.matcher(s);
return m.matches();
}
/**
* 将java.util.Date 格式转换为字符串格式'yyyy-MM-dd HH:mm:ss'(24小时制)<br>
* 如Sat May 11 17:24:21 CST 2002 to '2002-05-11 17:24:21'<br>
*
* @param time
* Date 日期<br>
* @return String 字符串<br>
*/
public static String
dateToString(Date time) {
SimpleDateFormat formatter;
formatter =
new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");
String ctime = formatter.format(time);
return ctime;
}
public static String
dateToString2(Date time) {
SimpleDateFormat formatter;
formatter =
new SimpleDateFormat(
"yyyy-MM-dd");
String ctime = formatter.format(time);
return ctime;
}
public static String
yymmdddateToString(Date time) {
SimpleDateFormat formatter;
formatter =
new SimpleDateFormat(
"yyyyMMdd");
String ctime = formatter.format(time);
return ctime;
}
public static String
hhmmssdateToString(Date time) {
SimpleDateFormat formatter;
formatter =
new SimpleDateFormat(
"hhmmss");
String ctime = formatter.format(time);
return ctime;
}
/**
* 将java.util.Date 格式转换为字符串格式'yyyy-MM-dd HH:mm:ss a'(12小时制)<br>
* 如Sat May 11 17:23:22 CST 2002 to '2002-05-11 05:23:22 下午'<br>
*
* @param time
* Date 日期<br>
* @param x
* int 任意整数如：1<br>
* @return String 字符串<br>
*/
public static String
dateToString(Date time,
int x) {
SimpleDateFormat formatter;
formatter =
new SimpleDateFormat(
"yyyy-MM-dd KK:mm:ss a");
String ctime = formatter.format(time);
return ctime;
}
public static boolean isNotNullAndEmpty(String str) {
if (
null != str && !str.equals(
"")) {
return true;
}
return false;
}
public static boolean isNotNullAndZero(List list) {
if (
null != list && list.size() >
0) {
return true;
}
return false;
}
public static boolean isNotNullAndEmptyByTrim(String str) {
if (
null != str && !str.trim().equals(
"")) {
return true;
}
return false;
}
public static List
removeDuplicate(List list) {
HashSet h =
new HashSet(list);
list.clear();
list.addAll(h);
return list;
}
public static boolean isTheLastMonthDAY() {
String curtime = getDate();
String nexttime = getDateAdd(curtime,
24);
if (!get_YYYY_MM(curtime).equals(get_YYYY_MM(nexttime))) {
return true;
}
return false;
}
/**
* 编码转换
*
* @param str
* @return
*/
public static String
getReadStr(String str) {
try {
String temp_p = str;
byte[] temp_t = temp_p.getBytes(
"ISO-8859-1");
String unicode =
new String(temp_t,
"gb2312");
return unicode;
}
catch (Exception e) {
return "null";
}
}
public static String
isoTOUTF(String str) {
try {
String temp_p = str;
byte[] temp_t = temp_p.getBytes(
"ISO-8859-1");
String unicode =
new String(temp_t,
"UTF-8");
return unicode;
}
catch (Exception e) {
return "null";
}
}
public static String
utfTOISO(String str) {
try {
String temp_p = str;
byte[] temp_t = temp_p.getBytes(
"UTF-8");
String unicode =
new String(temp_t,
"ISO-8859-1");
return unicode;
}
catch (Exception e) {
return "null";
}
}
public static String
toHtml(String str) {
if (str ==
null) {
return "";
}
else {
str = str.replaceAll(
"<",
"<");
str = str.replaceAll(
">",
">");
str = str.replaceAll(
"'",
"''");
str = str.replaceAll(
" ",
" ");
str = str.replaceAll(
"\n",
"<br>");
}
return str;
}
public static String
toText(String str) {
if (str ==
null) {
return "";
}
else {
str = str.replaceAll(
"<",
"<");
str = str.replaceAll(
">",
">");
str = str.replaceAll(
"''",
"'");
str = str.replaceAll(
" ",
" ");
str = str.replaceAll(
"<br>",
"\n");
}
return str;
}
/**
* 去掉字符串的html代码
*
* @param htmlStr
* 字符串
* @return 结果
*/
public static String
htmlToStr(String htmlStr) {
String result =
"";
boolean flag =
true;
if (htmlStr ==
null) {
return null;
}
char[] a = htmlStr.toCharArray();
int length = a.length;
for (
int i =
0; i < length; i++) {
if (a[i] ==
'<') {
flag =
false;
continue;
}
if (a[i] ==
'>') {
flag =
true;
continue;
}
if (flag ==
true) {
result += a[i];
}
}
return result.toString().replaceAll(
" ",
" ");
}
/**
* 去掉字符串里面的html代码。<br>
* 要求数据要规范，比如大于小于号要配套,否则会被集体误杀。
*
* @paramcontent 内容
* @return去掉后的内容
*/
public static String
stripHtml(String content) {
content = content.replaceAll(
"<p.*?>",
"rn");
content = content.replaceAll(
"<brs*/?>",
"rn");
content = content.replaceAll(
"<.*?>",
"");
content = content.replaceAll(
" ",
" ");
return content;
}
/**
* 判断某个数据是否在已知的List中存在的方法 存在则返回true否则返回faluse
*
* @param List
* 已知的List集合
* @param Strng
* 已知的字符串
* @return boolean true/false
*/
public static boolean theDateIsInThelist(List thelist, String thestring) {
if (
null != thelist && thelist.size() >
0) {
if (
null != thestring) {
for (
int i =
0; i < thelist.size(); i++) {
String curstring = (String) thelist.get(i);
if (thestring.equals(curstring)) {
return true;
}
}
}
}
return false;
}
/**
* 将短时间格式字符串转换为时间 yyyy-MM-dd
*
* @param strDate
* @return
*/
public static Date
strToDate(String strDate)
throws Exception {
SimpleDateFormat formatter =
new SimpleDateFormat(
"yyyy-MM-dd");
ParsePosition pos =
new ParsePosition(
0);
Date strtodate = formatter.parse(strDate, pos);
return strtodate;
}
/**
*@param ms
* 为要转换的秒数
*@return 返回h m s数组
*/
public static long[]
toHMS(
long ms) {
long d;
long s;
long h;
long m;
d = ms /
3600 /
24;
h = (ms - d *
24 *
3600) /
3600;
m = (ms - h *
60 *
60 - d *
24 *
3600) /
60;
s = ms - h *
60 *
60 - m *
60 - d *
24 *
3600;
return new long[] { d, h, m, s };
}
/**
* 获取当前时间的字符串 格式为"yyyyMMddHHmmss"
* @return 返回获取的当前时间
*/
public static String
getCurrentTimeStr() {
SimpleDateFormat sdf =
new SimpleDateFormat(
"yyyyMMddHHmmss");
String curDate = sdf.format(
new Date());
return curDate;
}
/**
*
* @return
*/
public static String
getStartTimeStr(){
SimpleDateFormat sdf =
new SimpleDateFormat(
"yyyyMMddHHmmss");
String startDate = sdf.format(
new Date(
0));
return startDate;
}
public static boolean isInteger(String value){
try{
java.lang.Integer.parseInt(value);
}
catch(Exception e){
return false;
}
return true;
}
public static boolean isFlost(String value){
try{
java.lang.Float.parseFloat(value);
}
catch(Exception e){
return false;
}
return true;
}
public static boolean isDate(String value,String formatstr){
try{
SimpleDateFormat formatter =
new SimpleDateFormat(formatstr);
formatter.setLenient(
false);
formatter.parse(value);
return true;
}
catch(Exception e){
e.printStackTrace();
return false;
}
}
public static void main(String[] args) {
}
}
